talking of time theories, my favourite one, is that time will always gowe the way it's suppose to go, (anti-paradox) in that only major event changes at critical key points can change history.
i.e. if you kill some person, that was insignificant. time will eventually correct that anomally, it will not have what some people suggest a "domino" or "butterfly" effect. but if you say kill someone who will eventually shape a world, then that timeline will change.